What is the solution to the equation below? Round your answer to two decimal places.
5* = 55
O A. x = 2.40
B. X= 2.49
C. x = 1.04
D. x= 0.40

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)